发明名称 Passively damped magnetic resonance (MR) detection configuration
摘要 A magnetic resonance (MR) detection configuration comprising at least one RF resonant circuit ( 1 ) with an inductance (L), a preamplifier module ( 2 ) and an RF receiver ( 7 ), wherein a reactive transformation circuit is connected between a high-impedance point (M) of the inductance (L) and a low-impedance connecting point (A) of the RF resonant circuit ( 1 ), which acts as an impedance transformer and wherein the low-impedance connecting point (A) is connected to the preamplifier module ( 2 ) via an RF line ( 15 ) having a characteristic impedance R<SUB>W</SUB>), is characterized in that at least one passive damping impedance (Z<SUB>DV</SUB>, Z<SUB>SV</SUB>, Z<SUB>DV'</SUB>, Z<SUB>SV'</SUB>) is provided in the preamplifier module ( 2 ) downstream of the RF line ( 15 ), wherein the passive damping impedance (Z<SUB>DV</SUB>, Z<SUB>SV</SUB>, Z<SUB>DV'</SUB>, Z<SUB>SV'</SUB>) can be connected to the resonant circuit ( 1 ) by a switching means during a damping and/or transmitting process, and wherein the respective amount of the complex reflection factor of passive damping impedance (Z<SUB>DV</SUB>, Z<SUB>SV</SUB>, Z<SUB>DV'</SUB>, Z<SUB>SV'</SUB>) relative to the characteristic impedance R<SUB>W</SUB>) of the RF line ( 15 ) exceeds a value of 0.5. This presents an MR detection configuration with an extensive damping concept, wherein all three processes (transmitting, damping and receiving processes) are optimized.
申请公布号 US2008061783(A1) 申请公布日期 2008.03.13
申请号 US20070882150 申请日期 2007.07.31
申请人 SCHWILCH ARTHUR;MAREK DANIEL;FREYTAG NICOLAS 发明人 SCHWILCH ARTHUR;MAREK DANIEL;FREYTAG NICOLAS
分类号 G01V3/00 主分类号 G01V3/00
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